2221888 has 28 divisors (see below), whose sum is σ = 4457700. Its totient is φ = 1098752.

The previous prime is 2221871. The next prime is 2221889. The reversal of 2221888 is 8881222.

It can be written as a sum of positive squares in 2 ways, for example, as 350464 + 1871424 = 592^2 + 1368^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9420 + ... + 9652.

2^2221888 is an apocalyptic number.

It is an amenable number.

2221888 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

2221888 is a wasteful number, since it uses less digits than its factorization.

2221888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 384 counting only the distinct ones).

The product of its digits is 4096, while the sum is 31.

The square root of 2221888 is about 1490.5998792433. The cubic root of 2221888 is about 130.4890455321.

The spelling of 2221888 in words is "two million, two hundred twenty-one thousand, eight hundred eighty-eight".